Technical characteristics and application of the h

Technical characteristics and application of Huaguang thermal CTP Version (I)

I. Introduction

CTP technology, the hottest technology in today's printing industry, has been popularized and applied at an amazing speed in China in recent years. It is reported that the total number of CTP systems installed in China has exceeded 200

thermal CTP plates can be divided into: ① thermal negative plates that need to be preheated have a wide range of applications, and the first generation of thermal CTP plates; ② Thermosensitive positive plate without preheating - second generation thermosensitive CTP plate; ③ Thermal phase change version without chemical development third generation thermal CTP version; ④ Thermal newspaper Edition - the new development of thermal system

the infrared light absorbing dye in the thermosensitive CTP plate absorbs the infrared laser and generates heat. After the heat reaches a certain temperature, the induced acid release agent is thermally decomposed to produce acid. When the plate is heated at 130 value= "140" unitname= "℃">140 ℃ for about 30 seconds, the phenolic resin in the exposure area will undergo bridge curing with the acid reaction of the catalyst, which is insoluble in the developer "target="_ Blank "> the image area is formed by the developer, and the unexposed area is dissolved in the developer to expose the aluminum based sand mesh layer and becomes a non image area. The thermal cross-linked plate has a low sensitivity to natural light, so it can work in the open room. Due to the different resins used, the imaging mechanism of the thermal plate is also different, mostly cross-linked curing imaging. The acid is generated by the photothermal acid releaser, and the heat is generated by the infrared absorber. The third generation thermal plate does not need any chemical treatment process "Today's sculptures can be directly used for printing when their boundaries are wider and wider. Thermal plates used in the newspaper industry have high sensitivity requirements, and the processing process is relatively complex when they are used, such as the need for film removal and preheating procedures. The continuous promotion and popularization of CTP system in China has promoted the research, development and production of thermal plates. Lucky group, located next to xiwolonggang, Nanyang City, an important town in the southwest of Henan Province, is the scientific research and production base of printing photosensitive materials in China The second film factory, since 1995, when we bought the tensile testing machine, we often didn't know what parameters the tensile testing machine needed. We began to develop the silver salt composite CTP version, and then successively carried out the research and development of silver salt diffusion CTP version, thermal CTP version, photosensitive CTP version, violet laser CTP and other computer direct plate making materials. The development of thermal CTP version of erjiao is the first to develop negative thermal CTP version, which was first put on the market in China in May, 2001. At present, more than 20 thermal CTP systems have selected Huaguang TN negative thermal CTP version, which was put into the market in 2002, and the TN thermal CTP version reached more than 100000 m2. The second generation thermal CTP version is also being developed. Huaguang TP Yangtu thermal CTP version will also be put on the market soon

erjiao began to cooperate with the Institute of Applied Chemistry of Beijing Normal University in 1998. The research and development of thermal CTP version has made rapid progress. In 2000, a sample version meeting the use requirements was tried out. At the 5th Beijing International Printing Exhibition in 2001, the further improved TN CTP version will be combined with Cleo thermal CTP machine for on-site demonstration, which will attract the attention of customers applying CTP technology at home and abroad

Huaguang TN thermal CTP plate is the only CTP plate that has been commercialized in China at present. As the first generation of thermal CTP version, it needs to be preheated when used. Because it is easy to master, low price, excellent performance and considerate market service, it is quickly recognized by many users in China. In particular, manufacturers using CTP systems that were originally equipped with preheating equipment are more interested in Huaguang TN thermal CTP version. In addition, if the printing resistance rate of vulva heat sensitive CTP version is significantly higher than that, you can ask professionals to quickly troubleshoot the positive CTP version, which is also the reason why many domestic users choose the negative heat sensitive CTP version

II. Performance introduction of Huaguang TN thermal CTP version

Huaguang TN thermal CTP version adopts imported high-quality aluminum plates specially used for the production of CTP plates. Through the special electrolytic oxidation process, the aluminum plate surface forms a dense multi-layer composite sand mesh structure and a dense oxide film, so as to have excellent wear resistance and accurate point reduction effect during printing. A connecting layer is coated between the plate base and the thermal layer, and then the thermal resin layer is coated with advanced coating device. The heat sensitive resin layer adopts special light and heat conversion materials to make the plate absorb light energy efficiently and suitable for open room operation

Huaguang thermal CTP version has two models: TN and TP. TN type is negative thermal CTP version, and TP type is positive thermal CTP version. See Table 1 for the plate properties of the two models

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Table 1